There you go:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps getBoundsZoomLevel Demo</title>
<script src="http://maps.google.com/maps?file=api&v=2&sensor=false"
type="text/javascript"></script>
</head>
<body onunload="GUnload()">
<div id="map" style="width: 400px; height: 300px"></div>
<script type="text/javascript">
if (GBrowserIsCompatible()) {
var map = new GMap2(document.getElementById("map"));
var markerBounds = new GLatLngBounds();
for (var i = 0; i < 10; i++) {
var randomPoint = new GLatLng( 39.00 + (Math.random() - 0.5) * 20,
-77.00 + (Math.random() - 0.5) * 20);
map.addOverlay(new GMarker(randomPoint));
markerBounds.extend(randomPoint);
}
map.setCenter(markerBounds.getCenter(),
map.getBoundsZoomLevel(markerBounds));
}
</script>
</body>
</html>
We are creating 10 random points in the above example and then passing each point to GLatLngBounds.extend(). Finally we get the correct zoom level with GMap2.getBoundsZoomLevel().
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